 The property has been known as Rocky Hill or Rock Hill, and the Fist (from the upthrusting chert rock boulders at its 540 ft. peak).In the 1800s, Rock Hill was the site of a quarry and brick factory, which were closed by the 1920s.In 1928, Josephine Randall, the Superintendent of Recreation for the San Francisco Recreation & Parks Department, proposed that the City buy the 16 acres of Rock Hill for recreation.